CODEWITHSUNDEEP
pythonpython-2.7parameterstuples
GreenAsJade
GreenAsJade

Reputation: 14685

Can I convert a tuple to a parameter list 'inline'?

traceback.format_exception() takes three arguments.

sys.exc_info() returns a tuple of three elements that are the required arguments for traceback.format_exception()

Is there any way of avoiding the two line "conversion":

a,b,c = sys.exc_info()
error_info = traceback.format_exception(a,b,c)

Clearly 

error_info = traceback.format_exception(sys.exc_info())

doesn't work, because format_exception() takes three arguments, not one tuple (facepalm!)

Is there some tidy way of doing this in one statement?

Upvotes: 0

Views: 109

Answers (1)

grc
grc

Reputation: 23555

You can use the * operator to unpack arguments from a list or tuple:

error_info = traceback.format_exception(*sys.exc_info())

Here's the example from the docs:

>>> range(3, 6)             # normal call with separate arguments
[3, 4, 5]
>>> args = [3, 6]
>>> range(*args)            # call with arguments unpacked from a list
[3, 4, 5]

Upvotes: 2

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